Applied Mechanics and Materials Vols. 423-426

Abstract: During the past fifty years, many metadata schemas have been developed in a variety of disciplines. However, current scientific metadata schemas focus on describing data, but not entities. They are descriptive, but few of them are structural and administrative. SKO Types is an entity-oriented theory for representing and linking Scientific Knowledge Objects by defining entities, relationships between entities, and attributes of each entity in the scientific domain. In SKO management, SKO Types serve as the basis for relating entities, entity components, aggregated entities, relationships and attributes to various tasks, e.g. linked entity, rhetorical structuring, strategic reading, semantic annotating, etc., that users may perform when consulting ubiquitous SKOs. In this paper, we propose an entity-based scientific metadata schema.

Abstract: We believe that semantic annotation will undermine the traditional way of reading and knowledge dissemination. In this paper, we introduce the SKOTeX, whose name is derived from LaTeX and BibTeX, respectively an editing tool which enables users to generate semantic enriched documentation, and a file format that specifies sets of annotating commands and storage forms similar to those used in LaTeX and BibTeX. SKO TeX can be applied in such a way as to take charge of the whole lifecycle management of Scientific Knowledge Objects (SKO), which includes the establishment, release, annotation, re-use, and so on.

Abstract: Retracted paper: Information theorists and electrical engineers agree that stochastic information is an interesting new topic in the field of programming languages. In fact, few physicists would disagree with the emulation of checksums. Our focus in our research is not on whether SMPS and virtual machines are entirely incompatible, but rather on presenting an analysis of interrupts of Dv.

Abstract: Two kinds of method writing Chinese character font library and graphics library to external SPI interface flash chip via USART and SD card are designed and realized. By using the SPI Flash chip to store Chinese character font library and graphics library, it can achieve the human-machine interface which uses a variety of user-defined Chinese font and pictures and effectively reduce the microcontrollers internal memory consumption. It can be widely used in small embedded systems.

Abstract: Parallel robot has the advantages of high rigidity,high bearing capacity and high repeatability of positioning accuracy,and make it more and more widely used in the field of industrial applications.In this paper,the 3-RRR parallel mechanism assembly robot was used as the research object;introduced the sources of error in the parallel mechanism operation platform's position and orientation,furthermore,analyzed the factors of the error sources;then built up that parallel robot's error analysis model,solved the error model with the differential equation,and analyzed the error of parallel robot's structural in rod length,joint angle,the moving platform and the base platform's radius of circle,then simulated with MATLAB.Research shows that All structure errors in parallel mechanism increased by the X axis monotone increasing.

Abstract: In this paper, the five-fingered hand with linkage mechanism is presented. Four-link mechanisms are used in the design of the finger. Based on the analysis on the geometrical constraint to linkage mechanisms and mechanically coupled, the mathematical model of the linkage parameters for the finger is obtained. An example is given, and motion simulation is carried out, which demonstrate the effectiveness of the mathematical model.

Abstract: Aimed at the goal of digital capture function for CNC profiling lathe, it has conducted researches on the key technologies of CNC system development, including automatic profiling measurement, profiling data collection methods and G-code program automatically generation. Before process, use an on-off-type laser sensor along the planned path close to the sample workpiece point by point to get series of coordinate points of the contour through the CNC system position latch function and the switch of senors state; through subsequent processing methods: contour segmentation, curve filtering, etc. And generate the G-code program for process. Practice shows that this special CNC system for profiling lathe, not only integrates automatic profiling data acquisition, automatic generation of process G code program, and has the characteristics of simple structure, easy operation and high efficiency.

Abstract: It is a challenge to get real-time solutions for the inverse kinematics problem of 6R robot. In this study, a digital signal processor (DSP) was adopted as the central processor for the algorithm inverse kinematics. Based on it, the robot end-effector carried out the interpolation of point-to-point spatial straight line, and the inverse kinematics solving of 6R robot manipulators end-effector was achieved. The deflection variations of the 6 joints were acquired during the interpolation in a Cartesian coordinate. The results show that inverse Kinematics solution for each interpolation point only cost 0.06588 millisecond using DSP 6711. This hard structure can ensure the real-time performance of control for robot and content the real-time control performance expected of industrial manipulators.

Abstract: With the electro-hydraulic servo mechanism is more and more widely used in aerospace, manufacturing industry and agricultural machinery, its control performances are required by process environment with more and more expectations, which include increasing response speed and improving tracking accuracy. Because the traditional PID controller possesses large overshoot, long conversion time, bad robustness and other shortcomings, the double-loop robust control algorithm is proposed. Simulation results show that, compared with traditional PID control scheme, the proposed control scheme can achieve accurate tracking of electro-hydraulic servo system quickly. Therefore, it enhances product performance, optimizes the design process, and also possesses a high application value.

Abstract: The adaptability of velocity changing of quadruped robot needs to be realized by gait transition. In this paper, a gait transition method of a quadruped robot based on changing the time sequence was investigated. The swing phase and the stance phase are separated by finite-state machine (FSM), and the locomotion gait involves breaking/enforcing synchronization or changing the order of leg liftoff events, it makes the duration time of liftoff and touchdown events variable. The gait transition from walk to trot is realized by the combination driving of time and event. The experiment is verified by interactive co-simulation among Matlab-Adams. The transition method satisfies the velocity changing of quadruped robot.